Blade-grinding machine.



J. P. GUPPEY.

BLADE GRINDING MACHINE. APPLIOATION'PILBD 00118, 1911.

Patented July 30, 1912.

4 SHEETS-SHEET l.

,lift/U67- I llllllllll J. P. GUPPEY.

BLADE GRINDING MACHINE.

APPLICATION FILED 0011.18, 1911.

1,034,362, Patented July 30,1912.

4 SHEETS-SHEET 2.

J. P. GUPPEY.

BLADE GRINDING MACHINE.

APPLIGATION FILED oo'ms, 1911.

11,034,362. Patented July so, 1912.

` 4 SHEETS-SHEET 3. lg- Zf 4.

@ a@ @WL/W7 @j J. P. GUPPEY. BLADE GRINDING MACHINE.

APPLIATION FILED 0GT.18, 1911.

1,034,362. Patented July 30,1912.

4 SHEETS-SHEET 4.

lNTTED STATES PATENT gOFFICE.

JOHN P. GUPPEY, 0F BOSTON, MASSACHUSETTS, ASSIGNOR TO BEDFCRD SAFETY RAZOR COMPANY, 0F BEDFORD, MASSACHUSETTS, A CORPORATTON OF`MASSACHUSETTS.

BLADE-GRINDING MACHINE.

Lesesaal.

Specification of 'Letters Patent.

Patented July 30, 1912.

To all whom it may concern.'

Be it known .that I, JOHN P. GUPPEY, a citizen-of the United States, and atresident of Boston, in the county of Suffolk and State of Massachusetts, have inventedv certain new and useful Improvements in Blade-Grinding Machines, of which the following is a speciication.

This invention relates to machines for grinding blades such as those used for safety razors, each blade being a fiat strip of sheet steel and ground to sharpen one of its longitudinal edges.

The invention has for its object to provide a machine adapted to automatically and accurately grindl a group or series of blades supplied to it, and it consists in the improvements hereinafter described and claimed.

Of the accoi'npanying drawings which form a partof this speccation, Figure 1 represents a plan view of a machine embodying the invention; Fig. 1a represents a sec-l tion on line 1a, 1a, of Fig. 1; Fig. 2 represents an end View of the same; Fig. 3 represents a section on line 3 3 of Fig. 1; Fig. 4 represents a section on line 4 4 of Fig. 1; Fig. 5 represents a section 011 line 5 5 of Fig. 1; Fig. 6 represents a section on line 6 6 of Fig. 1 ,Fig 6a represents an enlargement of a portion of Fig. 6; Fig. 7 represents a section on line 7 7 of Fig. 1; Fig. 8 represents a section on line 8 8 of Fig. 1; Fig. 9 represents a' section on line 9 9 of Fig. 1; Fig. 1() represents a section on line 10 10 of Fig. 9; Fig. 11 represents a section on line 11 11 of Fig. 8.

Similar reference `characters indicate vthe same or similar parts in all the figures.

In the drawings, 12 represents a bed or table supported by legs 13.

14 represents an elongated standard projecting upwardly from and ailixed to the bed. On one 'end portion of the standard is mounted a raceway which is preferably composed of two plates or. bars 15, 16, abut-ted together side by side, the bar 15 rbeing elo'ngated and aiixed to the standard 14 While the bar 16 is relatively short and attached to the elongated bar 15 by screws 17. The inner side of the bar 16 has a recessed portion 18, Fig. 5, which forms one side'of the raceway, the opposite side of which is formed by a portion of the inner side of the elongated bar 15. The raceway is adapted to 5 guide endwise thin steel blades 19, the Width of the raceway being such that the sides of a blade 19 inserted in it have a fairly close sliding tit against the sides of the raceway. The lower edge or bottom of the raceway is preferably formed by a strip or ledge 2O of hardened steel inserted in grooves in the innerisides of the bars 15 and 16, said ledge being adapted to sustain wear caused by the movement of the lower edges of the blades upon it, and being removable in case it becomes Worn.

21 and 22 represent grinding Wheels of any suitable material attached to shafts 23, 23, which are journaled in bearings supported by and above the bed 12. The said shafts are parallel with the raceway and located at. opposite sides thereof. The grinding wheels are in different planes, each at right angles with the raceway instead of being opposite each other, or in the same plane, s0 that their peripheries are adapted to enter the raceway to any extent desired to cause the formation of intersecting beveled faces and a cutting edge on a blade 19moved endwise in the raceway, one wheel acting on one side ofthe blade and the other on the opposite side. Each of the bars 15 and 16 has a slot or recess 24'in its outer side, said slots intersecting the raceway and permitting the grinding wheels to project thereinto, as shown by Figs. 4 and 6.

Opposite the periphery of each grinding wheel is a rest 25 adjustably secured. to one of the raceway bars by a screw 26 passing through a slot 27. Each rest supports one 'side of the blade and maintains the proper relation between its opposite side and the periphery of the grinding Wheel, which acts thereon. The grinding wheel shafts 23 are journaled in bearings on adjustable standards 28which are pivoted at 29, Fig. 2, to ears 30, on the bed 12, and are provided with lateral levers 31 projecting over the bed and adjustable by means of screws 32, 33 which are adapted to support the levers in different positions and impart swinging adjustments to the standards 28, so that the peripheries of the grinding wheels may be adjusted edgewise to compensate for wear and cause uniform grinding of the blades. The

screws 33 exert a bearing down pressure on i indicated by the arrows, Figs. 2, 4 and 6, by driving belts 35 running on pulleys 36, on

the shafts 23, the direction of rotation of the wheels being such that they press the blades on which they act against the ledge 20, which' forms the bottom of the raceway, the sharpened edge of the blade being prevented by the grinding Wheels from contacting with the opposite edge or top of the raceway and being dulled thereby. l

The raceway bar 16 is attached to one end portion of the elongated bar 15 and is shorter than the latter so that a considerable portion of the bar 15 projects from the raceway formed by the contacting portions of the bars 15 and 16, the projecting portion 152l of the bar 15 constituting an extension of one side of the raceway, and a stop which limits t-he sidewise movement of a pack of blades inserted in a blade magazine 37 los cated atone side of the extension 15a and adapted' to support a pack of blades, and guide the said pack so that the foremost blade thereof is pressed against the said eX- tension, and is supported thereby in alinement with the recess 18 in the bar 16. The

magazine 37 is composed of a bottom member 37 a, and side members 37 b, Figs. 3 and 9. relatively arranged to guide the Apack of blanks toward the raceWa-y extension l5, and an end member 37e, Fig. 1, having an orifice in which is adapted to slide a rod 38 having a head 39 bearing on the rear side of the pack of blades. A helical spring 40 attached at 42 (Fig. 1) to the'rod 3.8, and at 43 (Fi-g. 1) to the end member 37 is eX-' tended by a pack of blades interposed between the presser 39, and the racevvay extension 15a and normally contracts to force the presser and the pack of blades toward said extension. The foremost blade of the pack is therefore pressed against the raceway. extension 15a and held' in alinement with 'the recess' 18, in readiness to be forced endwise through said recess and presented to thegrindin wheels, by the reciprocating plunger next escribed.

The bar 15 is provided` at its inner side with a groove 44 which extends through the extension 15a. ln said groove `is iitted a 'plunger 45 which is formed to project from the groove and from the inner side of the .extension 15, as shown by F ig. 7 the plunthe pack and when the plunger is projected by the grinding wheels, or resisted by any l the plunger is presented yonly to the grinding wheel 21 by the projection of the plunger, the succeeding foremost blade which is `pressed against the extension 15l becoming an intermediary, which while being moved endwise by the plunger and presented to the grinding wheel 21, also moves the preceding partiallyground blade endwise and presents it to the grinding wheel 22, each completely ground blade being ejected from the raceway through a blade interposed between it and the plunger. The mechanism-which reciprccates the plunger is preferably organif/.cd as ncXt described.

17 represents a slide to which the outer end of the plunger 45 is attached, said slide being movable on the extension 15 which is provided with means for guiding the slide, the latter being reciprocated to impart the described movements to the plunger. As here shown, the inner side of the extension 15a has a recess 48 and gibs 49 (Figs. 9 and l1), said recess and gibs constituting the guide for the slide 47.

50 represents a bell crank lever pivoted at 5,1 to an arm 52 projecting downwardly from the bed 12. One arm of said lever has a slot 53 through which passes a screw 54 attached to the slide 47. The other arm of the lever 50 has a trundle roll 55 which cnters a cam groove 5G in a disk 57 ailixed to a shaft 58. Said shaft is journaled in fixed bearings below the bed12, and is provided with a bevel gear 59, meshing with a bevel gear G0 on a driving shaft 61. The cam groove is so formed that the rotation of the disk 57 oscillates the lever 50 and causes the latter to reciprocate the slide 47 and plunger 45. The cam groove 56 preferably has the form shown by Fig. 8, a portion of said groove having a pronounced curvature and another portion a lesser curvature, the form of the groove being such that during onchalf of a complete rotation of the disk 59 from the position shown by Fig. 8, and in the direction indicated by the arrow a'. a relatively slow movement is imparted to the lever in the direction indicated by the arrow y, the slide 47 and the plunger 45 being thus slowly projected, and during the completion of said rotation the slide and plunger are rapidly retracted.

The gear 69 has a frictioual connection with the shaft G1. instead of being positively connected therewith, so that said gear is adapted to slip on the shaft when the endwise movement of the blade is retarded obstruction, proper grinding of the' blades being thus insuredandinjury to the mechanism and blades prevented. As here shown.' the gear 60', whichisadapted toturn independently on the shaft, 1sadjustably` con# fined by a nut 63 between a col-lar ,64s atiixed to the shaft 61', anda washer 65 pressed by the nut against the gear, the shaft being screW-threadedto engage .the nut 63. The frictional connection thus providedl between the gear 60 and shaft 61 causes the rotation of the gear by the shaft under normal conditions, and permits the gear to slip on the shaft when the forward movement of a blade is materially retarded or obstructed.

l. A blade grinding machine comprising a raceway adapted to guideV a blad'eendwisein a rectilinear path, a pair of grinding Wheels arranged in different planes to grind opposite sides of a blade moving in the raceway, means for delivering blades to the raceway and means for forcing the delivered blades endwise through theraceway.

2. A blade grinding machine comprising a raceway adapted to guideI a blade endwise in a rectilinear path, a pair of grindin wheels arranged in different'planes to grind opposite sides of a blade moving in the race-` Way, one side of the raceway belng extended to form a guide, .a blade reservoir `opposite said guide, means for pressing a pack of blades sidewise toward the guide, the foremost blade being arrested by the guide, andv a reciprocating plunger movable beside the guide and adapted to force thel foremost blade endwise through the raceway.

3. A blade grinding machine comprising a raceway adapted to guide a blade endwise in a rectilinear path, a pair -of grinding wheels arrangedl in different planes to grind opposite sides of a blade moving in the raceway, means for delivering blades to the race- Way, means for forcing the delivered blades endwise through the raceway and adjustable rests attached to the Walls rof the racevvay and adapted to hold the blades against the grinding wheels.

4. A blade grinding machine comprising a racewayadapted to guide a blade endwise in a rectilinear path, a pair of grinding wheels arranged to grind opposite sides of a blade moving in t-he raceway, means for delivering blades sidewise into alinement with the raceway and a plunger movable length- Wise of the raceway and adapted to force thel delivered-blades endwise through the raceway.

5. A blade grinding machine comprising a raceway iadpated to guide a blade endwise in a rectilinear path, a 'pair of inding wheels arranged to grind opposite sldes of a blade moving in the raceway, one side of the raceway being extended to -form a guide, a blade reservolr opposite said guide,'means for pressing a pack of blades sidewise t-oward the guide, the foremost blade being arrestedl bythe guide, a reciprocating plunger movable Abeside' the guide and adapted to'forc'e the foremost blade endwise through the raceway, and mechanism for reciprocating saidfplunger, said mechanism having Y provisions for giving the plunger a relatively slow forward movementand a return movement.

I 6'. A blade grinding machine comprising al raceWa-y, adapted to guide a blade endwise in` a rectilinear path, a pairof grinding wheels arranged togrind opposite sides of a blade moving in the raceway, one side of the raceway being extended to form a guide, a blade reservolr opposite said guide, means for' pressing a pack of blades sidewise toquicker Ward the guide, the foremost blade being arrested by the guide, a reciprocating plunger movable beside .the guide and adapted to force the foremost blade endwise through the raceway, and'mechanism for reciprocating said plunger, said mechanism having provisionsfor -glving the plunger a yielding forward movement.

7. A blade grinding machine comprising `a raceway composed of two bars of differentlengths secured together side by side, the shorter bar being provided with a recess forming one side and two edges of the raceway, while the longer bar forms the opposite side of the raceway and an extension of one side thereof, and is provided with a groove, a plunger movable in said groove and projectin therefrom, means for moving a pack of bla es sidewise toward said eXten-. sion, means for movingsaid plunger to force the foremost blade through the raceway and a pair of grinding Wheels arranged to grind opposite sides of.a blade in the raceway.

8. A blade grinding machine comprising a raceway composed of two bars secured together side by side, portions'of the inner sides of said bars forming the sides of the raceway and a ledge formed independent-ly of the bars and removably engaged therewith, said ledge constituting the bottom of the raceway, means forv forcing blades endwise through said raceway, and a pairof grinding wheels arranged in different planes to grind opposite sidesof a blade in the raceway, the grinding wheels'bein'g adapted todpress the blades against' said removable le e.

9g A blade grinding' machine comprising a raceway adapted to guide a blade endwise in a rectilinear path, a pair of grinding wheels arranged to grind opposite sides of a blade in the raceway, a plunger adapted to force blades endwise through the raceway, and, mechanism for reciprocating the' plunger, said mechanism having provisions for givingV theplunger a relatively slow forward movement and a quicker return movement.

10. AA blade grinding machine comprising a raceway `adapted to guide a blade endwis'e in a rectilinear path, a pair of grind' wheels arranged to grind opposite sides o abl'ade in the raceway, aplfunger adapted to force blades endwi'se through the race` way, and mechanism for reciprocating the plunger, said mechanism having provisions for giving the .plunger a yielding forward movement. y.

11. A blade grinding machine comprising araceway adapted to guide a blade endwise A in arectilinear path, a pair of grinding wheels arranged' to grind 'opposite sides of 'gagement with each other whereby the plunger is permitted to stop during its forward movement. v I In ,testimony whereof I have aiiixed my signature, in presence of two witnesses.

JOHN P. GUPPEY. Witnesses:

C. F. BROWN, P. W. PEzzET'rI. 

